Automatic drainage-valve for air and water.



UNITED STATES'V rtented January 10, 1903.

PATENT OFFICE.

WILLIAM '.l. DONNEL-LY, OF NEW YORK, N. Y.

SPECIFICATION forming part of Letters Patent No.l 779,7 72, dated. January 10, 1905.

Application filed October 8,- 1904. Serinl No. 227,744.

To nllwhnm, it may concern: Be it known that i, WILLIAM T. DoNNnLLY a citizen of the United States of America, re-

siding in the borough of Brooklyn, city ot Newv York,count v of Kings, and State of N cw York, have invented certain new and useful lm provc ments 1n Automatic Drainage-Valves for Air and Vv'ater, of which the following is a specification.

My inventionrelates to improvements in automatic valves for regulating the discharge of air and of water of condensation from radiating devices, its olfjcct being to so construct the valve as to keep the valve-piece on its seat under ordinary conditions. while unseating the valve only during abnormal conditions,-

such as an unusuallyv large condensation or accumulation of dirt. The. frequent unseating of the valve will thus be avoided and a longer life of the valve obtained.

For this purpose my'invention consists, essentially, in an automatic valve comprising a valve body or casing provided with an inlet and an outlet, a :nain valve-piece normally resting upon its seat and adapted to control the outiiow, a by-pass from the chamber above the valve-seat to the outlet-passage beneathv Fig. 2 is u sectional elevation of part of myV valve, showing a modiiication. Fig. 3 is a diagrammatic view iliustrating the application of my valve to astenia-heating apparatus.

Similar letters of reference refer to corresponding parts throughout the several view-s.

Referring now to Fig. 3, A designates the steam-suppiy pipe of a heat-ing apparatus; B, ordinary valve controlling the suppl v of steam to radiating devices C. At the outlet of the radiating devices is placed the valve l), which forms the subject of the present invention. The outlets from these valves iead to the returns E, feeding into a header F, connected to the exhausting apparatus (i.

'.lhe valve l) consists of a valve-body c, Fig. 2, provided with the usual inlet a arid outlet with a valve passage-way c, controlled by the valve-piece jland provided with a by-pass g large enough to remove the normal. condensation. The valve-body is also provided with a screw-cap l to enable the operating mechanism to be placed in the valvebody. The operating mechanism consists, essentially, of a pressure-motor lt in the example shown, a movable piston, a main vaivepiece j', connected to the motor IlA by a hollow stem 1' and adapted to control the passageway f, a oat j in the valve-chamber m, carrIving rods p, passing through small vents o in the motor, to which rois is fastened an auxiliary valve-piece L', controlled by the float j and adapted to close the vent through the rod i'.

The motor is directly actuated by the differerence in pressure upon its two sides, the pressure on the tower side or chamber m being that in the inlet-pipe u and the pressure on the upper side. or ir. the chamber ln during the operation of the' valve being substantially that in the outlet-pipe During the period the valve is inactive the pressure on both sides of the motor is the same. being kept so by the small vents o in the pressure-motor. During the period ot' action of the valve the upper chamber u is in communication with the out let-pipe b through the hollow stem z', whose arca is much greater than the effective area of the vent-s o, although for sake of clearly showing the annular openings u the latter are shown enlarged on the drawings. A ditference of pressure is thus produced ou the motor suiiicicnt to operate it. When the water accumulates in the chamber m to an extent suilicient to raise the tioatj, and thereby the auxiliarv valve-piece r, communication is afforded between the upper chamber n and the outletib, thus reducing the pressure in the chamber n and causing the motor to act.

lWhen the motor zy moves upward, it lifts the main vaive-piecej'o' its seat and allows the accumulated waterto be blown out. Should the accumulation of water in the chamber m be due to the choking of' the by-pass f7 with dirt, the same action will take place and the water and dirt blown out when the main valvepiece j' is unseeted. In order to make the action more positive, a supplementary valvepiece I, Figfl, may be added. This valvepiece consist-s of a washer fitted about the hollow stem -i and about the two rods p and attached to or resting normally upon the shoulders q of the iioat j. A greater pressure is thus brought to bear upon the motor, as notv only the vent in the rod y1' is open when the float rises, but the area of thel small vents o 1n the piston is also considerably reduced by the lwasher .l being held against the motor l1'.

When the water has recedcd sufficiently, the loatjwill drop and the shoulders 1' on the rods p will hit the washer and remove it from 'the motor.

The auxiliary valve-piece is .then a am in its normal osition, closing the commpnication through the hollow stem the intercommuuication between the upper and lower chambers restablished, and the main valve-piece returned to its seat by the motor.'

lll/'hat l claim, and desire to secure by Letters Patent, is-

1. An automatic valve of the character specified comprising a valve body or casing forming a chamber provided with an inlet and an outlet, a main valvepiece normally resting upon its seat and Miapted to control the outflow, a by-pass from the chamber above the valvepiece to the outlet, a pressure-motor provided with small vents and controlling said main valve-piece, a normally closed larger vent establishing communicationbetween the low-pressure space beneath the main valvet seat and the space above the motor, an anxiliary valve-piece to control said larger vent and means foractuatingvsaid auxiliary valvepiece.

2. An automatic valve of the character specified comprising a valve body or casing forming a chamber provided with an inlet and anI outlet, a main valve-piece normally resting upon its seat and adapted to control the out.

iiow, a by-pass from the chamber above the valve-seat to the outlet, a pressure-motor comprising a piston placed within a cylindrical part of the casing and dividing the casing into 9,' valve-chamber and an upper space` said motor being adapted to control said main valvepiece and provided with small vents between the valve-chamber and the upper space, a normally closed larger vent establishing communication between the low-pressure space be-v neath the main valve-seat and the upper space aoove the motor, an auxiliary valve-piece to control said larger ventV and means for actuating said auxiliary valve-piece.

3. Ai. automatic valve ot' the character specitied comprising a valve body or casing forming a chamber provided with an inlet and an outlet, a valve-opening between the inlet and the outlet, a main valve-piece adapted to control the passage through the valve-opening and normally resting upon its seat, a by-pass from the chamber above the valve-opening to the outlet large enough to remove the normal condensation, a pressure-motor separating the valve chamber from the space above and adapted to control said main valve-piece, a hollow stem connecting the main valve-piece and the motor, its bore establishing communication between the outlet and the space above motor, an auxiliary valve-piece normally closing the upper end of the bore of said stem, a float within the valve-chamber actuating said auxiliary valve-piece and vents through the pressure-motor of considerably smaller aggregate area than the bore of the said valve-stem.

4. An automatic valve of the character specilied comprising a valve body or casing f orming a chamber provided with an inlet and an outlet, a main valve-piece adapted to control said outlet and normally closed, a by-pass from the chamber above the main valve-seat to the outlet, 'a pressure-motor provided with comparatively small vents and controlling said valve-piece, a normally closed larger vent through the said pressureanotor and the main valve-piece, an auxiliary valve-piece to control thc said larger vent, and a supplementary valve-piece adapted to decrease' the area of said lsmal ler vents. l

An automatic valve of the character specilied comprising a valve body or casing formi g a chamber provided with an inlet and an outlet, a main valve-piece adapted to control said outlet and normally closed, a by-pass from the chamber above the main valve-seat to the outlet, a pressure-motor provided with comparatively small vents and controlling said valve-piece, a normally closed larger vent through the said pressure-motor and the main valve-piece, an auxiliary valvefpiece to control the said larger vent, a fioat to control said auxiliary verve-piece, and a supplementary valve-piece comprising a washer carried by said float and adapted to decrease the area of said smaller vents. g ln testimony whereof I have signed my name 'to this specification, in the presence of two subscribing witnesses, this 7th day of October,

IOO 

